28955786895 has 96 divisors (see below), whose sum is σ = 59719051392. Its totient is φ = 12702375936.

The previous prime is 28955786833. The next prime is 28955786903. The reversal of 28955786895 is 59868755982.

28955786895 is a `hidden beast` number, since 2 + 8 + 9 + 557 + 8 + 68 + 9 + 5 = 666.

It is a Cunningham number, because it is equal to 170164²-1.

It is not a de Polignac number, because 28955786895 - 2⁶ = 28955786831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 833799 + ... + 867831.

It is an arithmetic number, because the mean of its divisors is an integer number (622073452).

Almost surely, 2^28955786895 is an apocalyptic number.

28955786895 is an abundant number, since it is smaller than the sum of its proper divisors (30763264497).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28955786895 is a wasteful number, since it uses less digits than its factorization.

28955786895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34161 (or 34158 counting only the distinct ones).

The product of its digits is 435456000, while the sum is 72.

The spelling of 28955786895 in words is "twenty-eight billion, nine hundred fifty-five million, seven hundred eighty-six thousand, eight hundred ninety-five".